Bloomfield, Leonard, author
Holt, Rinehart and Winston, 1961
Buku Teks
Hildebrand, David K., 1940-, author
Duxbury Press, 1996
Buku Teks
Cook, Peter, author
Monacelli Press, 2003
Buku Teks
Kozulin, Alex, author
Harvester Wheatsheaf, 1990
Buku Teks
Miller, Charles D., author
Scott, Foresman, 1969
Buku Teks